Search for dissertations about: "non-equilibrium transport"

Showing result 1 - 5 of 40 swedish dissertations containing the words non-equilibrium transport.

2. 1. Quantum transport in photoswitching molecules : An investigation based on ab initio calculations and Non Equilibrium Green Function theory

   Author : Anders Odell; Anna Delin; Anders Niklasson; Jonas Fransson; KTH; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; molecular electronics; electron transport; electron structure; density functional theory; non equilibrium green function theory; Electronic structure; Elektronstruktur;

   Abstract : Molecular electronics is envisioned as a possible next step in device miniaturization. It is usually taken to mean the design and manufacturing of electronic devices and applications where organic molecules work as the fundamental functioning unit. READ MORE

4. 2. Non-Orthogonality and Electron Correlations in Nanotransport : Spin- and Time-Dependent Currents

   Author : Jonas Fransson; Antti-Pekka Jauho; Uppsala universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; Physics; non-orthogonality; non-equilibrium; transport; nanosystem; quantum dot; spin-dependent; renormalization; Green function; diagram technique; many-body states; Hubbard operator; electron correlations; time-dependent; Fysik; icke-ortogonal; icke-jämvikt; transport; nanosystem; kvantprick; spinberoende; renormering; Green-funktion; diagramteknik; mångkropparstillstånd; Hubbadoperator; elektronkorrelationer; tidsberoende; Physics; Fysik; Fysik; Physics;

   Abstract : The concept of the transfer Hamiltonian formalism has been reconsidered and generalized to include the non-orthogonality between the electron states in an interacting region, e.g. quantum dot (QD), and the states in the conduction bands in the attached contacts. READ MORE

5. 3. Non-Equilibrium Charge Motion in Organic Solar Cells

   Author : Armantas Melianas; Olle Inganäs; Martijn Kemerink; Jenny Nelson; Linköpings universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES;

   Abstract : Organic photovoltaic (OPV) devices based on semiconducting polymers and small molecules allow for a low cost alternative to inorganic solar cells. Recent developments show power conversion efficiencies as high as 10-12%, highlighting the potential of this technology. Nevertheless, further improvements are necessary to achieve commercialization. READ MORE

6. 4. Transport theory and finite element methods for mesoscopic superconducting devices

   Author : Kevin Marc Seja; Chalmers tekniska högskola; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; non-equilibrium superconductivity; finite element methods; unconventional superconductors; quasiclassical theory; transport theory;

   Abstract : At low temperatures, electrons in a superconductor exhibit pairing correlations that result in a macroscopic, phase-coherent ground state. This leads to peculiar electromagnetic properties such as the flow of dissipationless charge currents and expelling of external magnetic fields. READ MORE

7. 5. Non-equilibrium dynamics of exactly solvable quantum many-body systems

   Author : Per Moosavi; Edwin Langmann; Denis Bernard; KTH; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; Fysik; Physics;

   Abstract : Recent experimental advances on ultracold atomic gases and trapped ions have made it possible to simulate exactly solvable quantum systems of interacting particles. In particular, the feasibility of making rapid changes, so-called quantum quenches, to such set-ups has allowed experimentalists to probe non-equilibrium phenomena in closed interacting quantum systems. READ MORE